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المؤلفون: Yi-fei Chen
المصدر: Journal of Computer Applications. 28:1177-1179
مصطلحات موضوعية: Discrete mathematics, Codd's 12 rules, Theoretical computer science, Relational calculus, Computer science, Relational database, Codd's theorem, Relational model, Conjunctive query, Relational algebra, Differentiation rules
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::4d2dfcc6e9c513c1d20bd265cb25e702
https://doi.org/10.3724/sp.j.1087.2008.01177